Media adviser Larsson acted alone: report

Staff at the WA Premier's office have been cleared of any involvement in former media adviser James Larsson's decision to send emails and text messages to journalists about an Opposition politician.

Mr Larsson sent a text message to journalists on January 16, telling them that Mark McGowan, a candidate at the time to lead Labor, was at the Subiaco Hotel.

Mr McGowan was actually at home with his three young children.

Mr Larsson also sent an email to journalists with photographs of Mr McGowan's $1.4 million Rockingham house, in Perth's south, questioning whether Mr McGowan was the working-class family man he'd portrayed himself to be.

Mr McGowan was later named Opposition leader and asked the Public Sector Commissioner, Mal Wauchope, to investigate the matter.

In a report tabled in parliament on Tuesday, Mr Wauchope found that Mr Larsson acted alone.

However, he suggested all government media advisers undertake ethics training.